The reason why people need to donate blood is mainly because many people's bodies can't coagulate normally during the operation, which is easy to cause a lot of blood loss. At this time, it is necessary to send blood to these patients through the outside world, otherwise they will die of excessive blood loss. And extract some red blood cells from the blood and make them into drugs specially for anemia patients. It can be said that this bag of blood donated by people can have many functions.
a
Blood donation has different effects on everyone's health. First of all, blood donation can promote the work of bone marrow in our body and produce more blood in our body. When we are adults, this function of bone marrow is almost stagnant, so after we donate blood, this function will be restarted, helping our blood to renew, reducing the viscosity of our blood, making our blood circulation better and reducing the possibility of stroke.
In addition, blood donation can also help us get to blood donation card, so that we can get free blood from the hospital when we need help in an accident. After we donate blood to a certain amount, we can use blood for free for life, and the children's families can also use some blood for free.
b
Some people say that blood donation is a good thing, so we should donate blood often in our lives, but we should not donate blood too often, because if we lose too much blood, it will easily affect people's health. Proper blood donation is beneficial, but excessive blood donation can lead to disease.
Some people will feel depressed after donating blood, some people will get red pimples after donating blood, and some people will feel dizzy and weak. These people may not be suitable for donating blood.
However, blood donation may be accompanied by some side effects. For example, some friends who are already weak are not suitable for donating blood. If you have a blood infectious disease and can't find it during the examination, you should also make it clear to the staff of the blood donation station in time, otherwise your blood will be lost to others' bodies, causing serious disease infection, which is a very dangerous behavior.
c
Therefore, it is best for everyone to do their best to donate blood.